Diesel generator compliance for a Gurugram office: consent, retrofits and GRAP restrictions

A power failure does not, by itself, give a Gurugram office permission to run any diesel generator available on the premises. The answer depends on the particular machine, the applicable Haryana pollution requirements, the NCR generator directions and the GRAP orders operating at the time. A landlord's assurance that a generator is “for emergency use” does not resolve these questions.

The position reviewed on 18 October 2026 includes an important change: the revised GRAP schedule issued on 29 September 2026 places the generator measures in Stage I. An office using an older checklist that waits for Stage II should update its operating procedure. The revised schedule and the separate order invoking a stage are different documents; publication of the schedule does not itself mean that every stage is currently invoked.

Start with an inventory of each machine

Record the generator's make, model, engine serial number, rated output in kW and kVA, fuel, manufacture date, installation date and emission standard. Attach the nameplate photograph, purchase or hire papers, type-approval and conformity documentation, and the manufacturer's specification. A machine described casually as “a 500 generator” cannot be classified reliably.

Include every unit at the site, including standby units and equipment brought in temporarily. State who owns each machine, who operates it and which loads it supplies. A tenant may buy backup power from a common generator without owning the engine. That arrangement changes document custody and contractual responsibility; it does not change the machine's emissions.

Distinguish a generating set manufactured to the standards under the 3 November 2022 notification from an older engine with an accessory installed later. Installation in a new building does not establish a new emission standard. Likewise, a sales invoice headed “CPCB compliant” is insufficient if it does not identify the relevant standard and equipment.

The inventory should identify the fuel-supply arrangement, acoustic enclosure, exhaust stack and any retrofit emission-control device. For converted machines, retain the approved technical configuration rather than recording only the conversion invoice.

Keep Haryana consent and NCR operating controls separate

Haryana's consent system classifies activities and projects, while CAQM directions regulate generator operation across NCR. Being outside an ordinary consent requirement does not create an exemption from generator emission or GRAP controls. Conversely, holding a consent containing a generator entry does not authorise operation contrary to a later binding restriction.

For an office in a commercial development, first request the building's pollution approvals and their equipment schedules. Check whether the generator, its capacity and its location are actually covered. An approval for another phase, another tower or a smaller installation is not automatically an approval for the present arrangement.

The current Haryana White-category list includes diesel generating sets with total capacity of 1 MVA or less, equipped with acoustic enclosures and adequate stack height. The word “total” matters: several generators should not be presented as unrelated machines to avoid considering the installation as a whole. Check the applicable White-category intimation requirements and whether other activities at the building independently require consent. Do not extend this entry to every commercial complex merely because one machine is below 1 MVA.

Where consent is required, check the actual establishment and operating permissions, amendments, compliance directions and applicable conditions. For a tenant, obtain a document identifying the consent holder and the equipment served. A maintenance contractor's licence is not the building's pollution approval.

Stack height and acoustic performance require separate attention. Neither fitting a particulate-control device nor buying a gas conversion kit proves that exhaust dispersion and noise requirements are satisfied. Use the applicable standards and site conditions, supported by measurements and competent technical assessment; do not select a stack height from an unrelated building's approval.

Use the current capacity-specific configuration

The September 2026 GRAP schedule reproduces the generator matrix linked to Direction 76 and its amendments. The practical distinctions are as follows.

The table is an operating-screening aid, not a product recommendation. “No restrictions” in this matrix does not waive noise limits, approval conditions, fuel safety, maintenance duties or a specific closure direction. It also does not turn a generator into an unrestricted regular electricity source. The revised schedule separately requires that diesel generators should not be used as the regular power supply.

For the 41–800 kW older group, do not tell a client that both dual fuel and a retrofit are invariably required: the current matrix provides alternatives. Equally, do not accept a vendor's unsupported claim that any filter is an eligible retrofit. Identify the certified agency, the approved device and engine compatibility, installation record, commissioning evidence and required monitoring or performance checks.

Understand the narrow emergency-service route

The schedule's emergency list includes operation of elevators, escalators and travelators; medical services; railway services; metro and MRTS services; airports and inter-state bus terminals; sewage treatment plants; water pumping stations; specified national-security, defence and nationally important projects; and telecommunications and IT/data services.

This list should be applied to the service actually powered. An office cannot label its entire air-conditioning, pantry and general socket load an elevator service merely because the generator also supplies lifts. Have the electrical contractor identify circuits and the facility manager explain how restricted emergency loads can be separated.

Likewise, an ordinary office using email is not automatically entitled to treat its complete business as an exempt telecommunications or IT/data service. Where a claimed emergency classification is material to running an otherwise restricted machine, obtain a clear legal and technical basis, and seek the competent authority's clarification if the service boundary is uncertain.

For older 19–41 kW machines, the stated qualification concerns inability to operate in dual-fuel mode owing to non-availability of gas infrastructure and supply. It is not a general exemption whenever diesel is cheaper or the gas contract has not been arranged. Preserve evidence of the actual supply constraint and the prescribed emergency service.

Check the operating order before each restricted-period run

Maintain a dated GRAP register showing the latest invocation, escalation and revocation orders obtained from official channels. The stage is not decided by a facility manager's reading of one local sensor. The schedule uses Delhi AQI and forecasts within the formal decision process; an office should follow the operative order and its effective time.

Stage I is associated with poor air quality, Stage II with very poor, Stage III with severe and Stage IV with severe-plus conditions. Higher stages retain the earlier-stage measures. Consequently, moving from Stage I to Stage III does not remove Stage I generator controls.

The May 2026 invocation should not be copied into an October operating log as if it necessarily remains current: Stage I was formally revoked on 29 May. Nor does an old homepage entry prove that no subsequent order exists. This article describes the September framework and does not certify a live stage for a future operating shift. The shift supervisor must retain the current order before giving permission to start the machine.

Check for separate directions affecting the particular site or class of equipment as well. GRAP revocation does not extinguish continuing emission standards, Haryana conditions or an individual prohibition. Record the source, issue date, effective time and person who checked it rather than saving only a screenshot of an AQI number.

Ask the landlord for an evidence pack

Before the next seasonal deterioration, request these records:

• An equipment schedule with serial numbers, capacities, fuel and emission-standard documents.
• The relevant building and generator consent, White-category intimation or other applicability record, including amendments and outstanding notices.
• Acoustic-enclosure and stack details, and applicable noise and emission test results.
• Retrofit or dual-fuel approval, installation, commissioning and service documentation linked to the actual engine.
• Gas-supply evidence where relevant, and any written clarification relied on for an emergency-service claim.
• Maintenance records, fault reports, fuel records and hour-meter logs.
• A circuit/load schedule and a written operating procedure reflecting current CAQM and GRAP requirements.

These are recommended due-diligence controls; a tenant's checklist is not itself an official approval. A building owner should nominate the person who can retrieve the authoritative documents immediately, including outside ordinary office hours.

Where a manager supplies only a one-page “compliance certificate,” ask what it certifies and what supports it. A photograph of a retrofit box does not show whether it is operating, bypassed or maintained. A laboratory report for another serial number is not evidence for the machine on site.

Design a usable operating log

Record the date, start and stop time, hour-meter readings, reason for operation, grid-supply interruption, machine used, loads supplied, fuel mode, responsible operator and any fault. During GRAP, identify the current order and the configuration or emergency-service basis relied on. Record maintenance runs separately; calling a test “backup” does not settle whether it is permitted.

For example, a commercial tower has an older 500 kVA unit with a qualifying certified retrofit. A power cut occurs while Stage I is invoked. The relevant question is whether the unit actually satisfies the applicable matrix and continuing conditions, not whether all diesel generation is automatically banned. If its control device is bypassed pending repair, the previous commissioning report cannot justify treating the present operation as compliant.

A second office hires a small portable generator to operate lighting and workstations. The hire company's assurance that it is used “only during emergencies” does not make the office's ordinary power requirement a prescribed emergency service. Hiring should therefore include the same capacity, standard and operating-permission review as ownership.

Put responsibilities into the service arrangement

The lease or facility-management agreement should identify who maintains the machine, obtains approvals, keeps records, checks GRAP orders and can stop operation. Include a process for reporting new equipment, control-device failure, fuel changes and notices. Contractual allocation helps prevent gaps but cannot override public-law duties.

In an assureOffice client workflow, the equipment inventory can sit alongside the office's lease and compliance follow-up list. The useful output is a dated request, an accountable owner and retained evidence. It should not be represented as a specialist generator certification or automatic permission to operate.

A practice using assureoffice.in can also flag unresolved landlord documents during an office-opening or relocation review. The final operational decision still requires current orders, valid equipment evidence and an appropriately responsible person at the premises.

Frequently asked questions

1. Does a power cut automatically permit diesel-generator use during GRAP?

No. Establish the machine's capacity group, standard, control configuration and any applicable restricted-use conditions. A grid outage explains why backup is wanted; it does not create an exemption from the operative directions.

2. Do the generator restrictions begin only at Stage II?

That is an outdated assumption. The 29 September 2026 revised schedule places the generator measures in Stage I. Update instructions used by security staff, contractors and facility managers so they follow the revised schedule and current invocation order.

3. Is every diesel generator completely banned during GRAP?

No. The current matrix distinguishes cleaner-standard machines, fuel types, capacity bands and emission-control configurations. A qualifying unit may have no restriction under that matrix, while a different unit at the same site can face restricted use.

4. Is the landlord's generator covered by the tenant's paperwork?

Not necessarily. Identify the equipment and the entity named in the relevant approval or intimation. Obtain the landlord's building-level records and confirm that they cover the particular installation supplying the tenant.

5. Does a White-category entry remove CAQM obligations?

No. State consent classification and NCR operating controls perform different functions. The White-category position must be checked on its own conditions; generator emission, acoustic and applicable CAQM requirements continue separately.

6. How is the Haryana 1 MVA White-category entry applied?

It refers to total generator capacity and requires acoustic enclosures and adequate stack height. Review all installed units and the building's other activities. Do not assume that one generator below the limit exempts an otherwise consent-requiring project.

7. Must an older 500 kVA generator have both dual fuel and a retrofit?

The current 41 kW to below 800 kW older-set band provides dual-fuel mode or a qualifying retrofitted emission-control device through a certified agency. Establish the actual approved route, rather than imposing or accepting a vendor's generic description.

8. Does fitting a retrofit make the engine a new-standard generator?

No. Keep the original emission-standard classification and document the retrofit as the control route for that engine. The distinction matters because different entries in the matrix have different conditions and evidentiary requirements.

9. Can we rely on an old emergency-use exemption?

Only after checking whether it remains operative and fits the current service and equipment. Temporary historic relaxations are not permanent entitlements. The present schedule's specified emergency services should be read precisely.

10. Does supplying lifts exempt all office loads?

No. The lift service and general office power should be identified separately. An electrical load schedule and a workable restriction procedure help establish that any emergency-service reliance concerns the permitted service rather than the whole building.

11. Is every office with computers an IT/data emergency service?

That conclusion should not be assumed. Ordinary use of computers does not establish that all office operations fall within the prescribed service. Obtain a properly supported classification where the exemption is essential to operation.

12. Can a small portable generator be hired for ordinary desk work?

The current matrix generally does not permit portable sets below 19 kW, except for prescribed emergency services. Hire does not change the rule. Check the unit and intended loads before booking equipment.

13. What if gas infrastructure is unavailable?

The older 19–41 kW band contains a specific emergency-service qualification for non-dual-fuel operation caused by non-availability of gas infrastructure and supply. It is not an unrestricted office-backup allowance or a substitute for investigating available compliance options.

14. Are gas generators free from every environmental requirement?

No. The matrix's unrestricted treatment of specified gas fuels does not waive noise, stack, safety, approval or maintenance requirements. Check the actual gas and equipment rather than describing all alternative fuels as equivalent.

15. What should we retain after a retrofit installation?

Retain engine identification, device approval and certification details, compatibility evidence, installation and commissioning records, operating instructions, maintenance requirements and relevant performance results. Records should make it possible to connect the approved device to the actual machine.

16. Is an old consent enough if capacity is increased?

No. Reconcile the approved equipment schedule with the expanded installation and current classification. Obtain the necessary amendment or applicability confirmation before assuming the original document covers additional capacity and changed emissions.

17. Can maintenance test runs be ignored in the log?

No. Record their purpose, duration and operating conditions. A test run still operates the engine and should be considered against applicable restrictions; a maintenance label is not an independent statutory exemption.

18. Does revocation of GRAP permit unrestricted routine generation?

No. Continuing generator directions, emission standards, Haryana requirements and individual site orders remain relevant. The revised framework also seeks to prevent diesel sets becoming a regular power source. Review the reason and legal basis for use.

19. Who should check the current stage at night?

Assign a named role, with a trained backup, through the facility operating procedure. The responsible person should be able to obtain official orders and escalate uncertainty. A daytime-only document process is inadequate for equipment operated around the clock.

20. What should the office do if the evidence is incomplete?

Identify the exact missing item and obtain it from the owner, operator, manufacturer or competent authority. Arrange compliant backup or continuity measures while the gap is resolved. Do not turn an unavailable certificate into an unsupported assertion that the installation is approved.